This place was outstanding. It's a 10-12 minute walk from the Ekkamai station. If you want to go to the Old City, you can take a bus. It takes about an hour, but busses run regularly and are cheap.
There are many restaurants and convenience stores in the area, so you have everything at your finger tips. Check out the Bangkok University food court for cheap and reliable food. There is also Gateway Mall for more expensive and more western food as well as a big grocery store.
The pool was fabulous, especially after a long day in the heat.
The front desk staff were always helpful, friendly and supportive.
I know that some reviews have issues with the wi-fi code changing every 24 hours, but if you go out of the building you can get in the habit of picking up the latest code at the desk when you come in. Not really a major issue.
They also have a filtered water machine in the lobby.
I'll be travelling to Thailand repeatedly over the next several years for research and business, and this is the place for me to stay in Bangkok.